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Hydrogenation method for unsaturated hydrocarbon in hydrocarbon stream

An unsaturated, logistics technology, applied in the hydrogenation of diolefins and monoolefins, and alkynes in hydrocarbon streams, can solve the problems of complex catalyst composition and cumbersome preparation process, and achieve energy saving, high reaction performance, good The effect of stability

Active Publication Date: 2011-11-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the need to include specific Pd precursors or crystal form control agents in the preparation process, the composition of the catalyst becomes complicated and the preparation process is more cumbersome
In addition, the adsorption capacity of the reactants on the surface of the catalyst noble metal is an important factor affecting its activity and selectivity, which has not been reflected in the existing literature.

Method used

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  • Hydrogenation method for unsaturated hydrocarbon in hydrocarbon stream
  • Hydrogenation method for unsaturated hydrocarbon in hydrocarbon stream
  • Hydrogenation method for unsaturated hydrocarbon in hydrocarbon stream

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Take 13.5ml 10mg / ml PdCl 2 Solution, add 1mol / L NaOH solution dropwise to adjust the pH to 5.6, then spray to 100.0gAl 2 o 3 Spherical carrier surface, use 20ml of 50% v / v isopropanol aqueous solution to wet the carrier, and use it under vacuum 60 The Coγ radiation source was irradiated at room temperature for 15 hours, and the absorbed dose rate was 35Gy / min. After irradiation, the sample was placed in an oven, and dried at 80° C. and 120° C. for 12 hours in turn to obtain the catalyst A, which had a gray-black appearance and a Pd content of 0.135 wt%.

Embodiment 2

[0043] Take 30ml10mg / ml PdCl 2 solution, sprayed to 100.0g of La and K modified Al 2 o 3 Spray 5ml of 1mol / L NaOH solution on the surface of the toothed spherical carrier, use 20ml of 50% v / v isopropanol aqueous solution to wet the carrier, and use it under vacuum 60 The Coγ radiation source was irradiated at room temperature for 15 hours, and the absorbed dose rate was 70Gy / min. After irradiation, the sample was placed in an oven, and dried at 80° C. and 120° C. for 12 hours in turn to obtain the catalyst B, which had a gray appearance and a Pd content of 0.300 wt%.

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Abstract

The invention provides a hydrogenation method for alkene, dialkene and monoolefine in a hydrocarbon stream. The method comprises steps that: a hydrocarbon stream containing alkene and / or dialkene and / or monoolefine and hydrogen are added into a hydrogenation reactor equipped with a supported Pd catalyst, and the alkene and / or dialkene and / or monoolefine in the hydrocarbon stream are all transformed into alkane through hydrogenation, at an inlet temperature of 10-80 DEG C, with a molar ratio of hydrogen / unsaturated hydrocarbons within 1-10, and under a reaction pressure of 0.1-4MPa. The supported Pd catalyst comprises a carrier, palladium and an optional modifying component, and is tested by a carbon monoxide adsorption in situ fourier transform infrared spectroscopy method at 40 DEG C; and in an obtained infrared spectrum, an area ratio of a bridge-type absorption peak at 1930-1990 cm<-1> to a bridge-type absorption peak at 1870-1930 cm<-1> is less than 0.2, and more preferably less than 0.15. The method of the invention has high activity and good stability to hydrogenation reaction of unsaturated hydrocarbons in a C_4 hydrocarbon stream, and can operate for a long time.

Description

technical field [0001] The present invention relates to a method for hydrogenation, more particularly, the present invention relates to a method for hydrogenation of alkynes, diolefins and monoolefins in hydrocarbon streams. Background technique [0002] In the process of preparing ethylene by steam cracking of naphtha, the yield of C4 hydrocarbons can reach 20%-25% of the ethylene yield. In addition to the extraction of butadiene and some butene in the C4 hydrocarbons, the rest are mainly burned as fuel, and the chemical utilization rate is low. In addition to the separation of diolefins in the C5 fraction, the utilization rate of other parts of the chemical industry is lower. Therefore, make full use of C4 and C5 resources, carry out hydrogenation treatment on the mixed C4 and C5 fractions or the remaining C4 and C5 parts after extracting diolefins and some monoolefins, and unsaturated C4 and C5 Hydrocarbons are converted into saturated C4 and C5 hydrocarbons, which can ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G45/40C10G49/06C10G49/08B01J23/63B01J23/58B01J35/08
Inventor 于海波戴伟徐立英乐毅彭晖张齐朱云仙毛祖旺高树升石瑞红
Owner CHINA PETROLEUM & CHEM CORP
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